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<h1>src/qvip/qvimageio.cpp</h1><a href="qvimageio_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> *      Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012. PARP Research Group.</span>
<a name="l00003"></a>00003 <span class="comment"> *      &lt;http://perception.inf.um.es&gt;</span>
<a name="l00004"></a>00004 <span class="comment"> *      University of Murcia, Spain.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> *      This file is part of the QVision library.</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> *      QVision is free software: you can redistribute it and/or modify</span>
<a name="l00009"></a>00009 <span class="comment"> *      it under the terms of the GNU Lesser General Public License as</span>
<a name="l00010"></a>00010 <span class="comment"> *      published by the Free Software Foundation, version 3 of the License.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> *      QVision is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> *      but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00015"></a>00015 <span class="comment"> *      GNU Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> *      You should have received a copy of the GNU Lesser General Public</span>
<a name="l00018"></a>00018 <span class="comment"> *      License along with QVision. If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020 
<a name="l00024"></a>00024 
<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include &lt;float.h&gt;</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include &lt;iostream&gt;</span>
<a name="l00029"></a>00029 
<a name="l00030"></a>00030 <span class="preprocessor">#include &lt;qvip.h&gt;</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include &lt;qvmath.h&gt;</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include &lt;<a class="code" href="qvdefines_8h.html" title="File from the QVision library.">qvdefines.h</a>&gt;</span>
<a name="l00033"></a>00033 <span class="comment">//#include &lt;qvmatrixalgebra.h&gt;</span>
<a name="l00034"></a>00034 <span class="preprocessor">#include &lt;QVPolyline&gt;</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include &lt;QVPolylineF&gt;</span>
<a name="l00036"></a>00036 <span class="preprocessor">#include &lt;QList&gt;</span>
<a name="l00037"></a>00037 
<a name="l00038"></a>00038 <span class="preprocessor">#ifdef QVIPP</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor">#include &lt;qvipp.h&gt;</span>
<a name="l00040"></a>00040 <span class="preprocessor">#endif</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span>
<a name="l00042"></a>00042 <span class="keyword">template</span>&lt;<span class="keywordtype">int</span> Channels&gt; <span class="keywordtype">void</span> writeUCharImageToFile(QFile &amp;file, <span class="keyword">const</span> <a class="code" href="classQVImage.html" title="Image representation class for the QVision.">QVImage&lt;uChar, Channels&gt;</a> &amp;image)
<a name="l00043"></a>00043         {
<a name="l00044"></a>00044         <span class="keywordflow">for</span> (uInt i = 0; i &lt; image.<a class="code" href="classQVImage.html#a55e71ad628f450ee82bb4226cb62ec17" title="Overloaded function from QVGenericImage::getRows().">getRows</a>(); i++)
<a name="l00045"></a>00045                 file.write((<span class="keywordtype">char</span> *) image.<a class="code" href="classQVImage.html#a200b9b19dbe2a79f75d603f9ecc67bf1" title="Method to obtain image data buffer, in read mode.">getReadData</a>() + i*image.<a class="code" href="classQVImage.html#a8c5cb45d0c7fbf135d89c5cb40ed4875" title="Overloaded function from QVGenericImage::getStep().">getStep</a>(), Channels * image.<a class="code" href="classQVImage.html#ad0f2758702ee4d96d538aa353ae81bb7" title="Overloaded function from QVGenericImage::getCols().">getCols</a>());
<a name="l00046"></a>00046         }
<a name="l00047"></a>00047 
<a name="l00048"></a><a class="code" href="group__qvip.html#ga3039166fdcc15216e5319d1c5e652c8f">00048</a> <span class="keywordtype">bool</span> <a class="code" href="group__qvip.html#ga3039166fdcc15216e5319d1c5e652c8f" title="Create a yuv4mpeg2 video file.">writeYUV4MPEG2Header</a>(QFile &amp;file, <span class="keyword">const</span> <span class="keywordtype">int</span> cols, <span class="keyword">const</span> <span class="keywordtype">int</span> rows, <span class="keyword">const</span> <span class="keywordtype">int</span> fps)
<a name="l00049"></a>00049         {
<a name="l00050"></a>00050         file.write(QString(<span class="stringliteral">&quot;YUV4MPEG2 W%1 H%2 F%3:1 Ip A0:0\x0a&quot;</span>).arg(cols).arg(rows).arg(fps).toAscii());
<a name="l00051"></a>00051 
<a name="l00052"></a>00052         <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00053"></a>00053         }
<a name="l00054"></a>00054 
<a name="l00055"></a><a class="code" href="group__qvip.html#ga8009ad640bdcbcec1c00f6a92f9aed27">00055</a> <span class="keywordtype">bool</span> <a class="code" href="group__qvip.html#ga8009ad640bdcbcec1c00f6a92f9aed27" title="Write YUV image frames to a yuv4mpeg2 video file.">writeYUV4MPEG2Frame</a>(QFile &amp;file, <span class="keyword">const</span> <a class="code" href="classQVImage.html">QVImage&lt;uChar,1&gt;</a> imageY, <span class="keyword">const</span> <a class="code" href="classQVImage.html">QVImage&lt;uChar,1&gt;</a> imageU, <span class="keyword">const</span> <a class="code" href="classQVImage.html">QVImage&lt;uChar,1&gt;</a> imageV)
<a name="l00056"></a>00056         {
<a name="l00057"></a>00057         <span class="comment">// Write &#39;FRAME&#39; keyword.</span>
<a name="l00058"></a>00058         file.write(QString(<span class="stringliteral">&quot;FRAME\x0a&quot;</span>).toAscii());
<a name="l00059"></a>00059 
<a name="l00060"></a>00060         <span class="comment">// Write image data buffers</span>
<a name="l00061"></a>00061         writeUCharImageToFile&lt;1&gt;(file, imageY);
<a name="l00062"></a>00062         writeUCharImageToFile&lt;1&gt;(file, imageU);
<a name="l00063"></a>00063         writeUCharImageToFile&lt;1&gt;(file, imageV);
<a name="l00064"></a>00064 
<a name="l00065"></a>00065         file.flush();
<a name="l00066"></a>00066 
<a name="l00067"></a>00067         <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00068"></a>00068         }
<a name="l00069"></a>00069 
<a name="l00070"></a><a class="code" href="group__qvip.html#ga0eee999bb396163138cd084286249a05">00070</a> <span class="keywordtype">bool</span> <a class="code" href="group__qvip.html#ga8009ad640bdcbcec1c00f6a92f9aed27" title="Write YUV image frames to a yuv4mpeg2 video file.">writeYUV4MPEG2Frame</a>(QFile &amp;file, <span class="keyword">const</span> <a class="code" href="classQVImage.html">QVImage&lt;uChar,1&gt;</a> imageGray)
<a name="l00071"></a>00071         {
<a name="l00072"></a>00072         <span class="keyword">const</span> <span class="keywordtype">int</span> cols = imageGray.<a class="code" href="classQVImage.html#ad0f2758702ee4d96d538aa353ae81bb7" title="Overloaded function from QVGenericImage::getCols().">getCols</a>(), rows = imageGray.<a class="code" href="classQVImage.html#a55e71ad628f450ee82bb4226cb62ec17" title="Overloaded function from QVGenericImage::getRows().">getRows</a>();
<a name="l00073"></a>00073         <a class="code" href="classQVImage.html">QVImage&lt;uChar, 1&gt;</a> imageU(cols/2, rows/2);
<a name="l00074"></a>00074         <a class="code" href="classQVImage.html">QVImage&lt;uChar, 1&gt;</a> imageV(cols/2, rows/2);
<a name="l00075"></a>00075         <a class="code" href="group__qvippIDEAIF.html#gae2bed87200a1f753701bf5fc1e7a476b" title="Sets pixels in the image buffer to a constant value.">Set</a>(128, imageU);
<a name="l00076"></a>00076         <a class="code" href="group__qvippIDEAIF.html#gae2bed87200a1f753701bf5fc1e7a476b" title="Sets pixels in the image buffer to a constant value.">Set</a>(128, imageV);
<a name="l00077"></a>00077 
<a name="l00078"></a>00078         <span class="keywordflow">return</span> <a class="code" href="group__qvip.html#ga8009ad640bdcbcec1c00f6a92f9aed27" title="Write YUV image frames to a yuv4mpeg2 video file.">writeYUV4MPEG2Frame</a>(file, imageGray, imageU, imageV);
<a name="l00079"></a>00079         }
<a name="l00080"></a>00080 
<a name="l00081"></a>00081 <span class="preprocessor">#ifdef QVIPP</span>
<a name="l00082"></a><a class="code" href="group__qvip.html#gaafafdc5bedd299e344cf744f692fd189">00082</a> <span class="preprocessor"></span><span class="keywordtype">bool</span> <a class="code" href="group__qvip.html#ga8009ad640bdcbcec1c00f6a92f9aed27" title="Write YUV image frames to a yuv4mpeg2 video file.">writeYUV4MPEG2Frame</a>(QFile &amp;file, <span class="keyword">const</span> <a class="code" href="classQVImage.html">QVImage&lt;uChar,3&gt;</a> imageRGB)
<a name="l00083"></a>00083         {
<a name="l00084"></a>00084         <span class="keyword">const</span> <span class="keywordtype">int</span> cols = imageRGB.<a class="code" href="classQVImage.html#ad0f2758702ee4d96d538aa353ae81bb7" title="Overloaded function from QVGenericImage::getCols().">getCols</a>(), rows = imageRGB.<a class="code" href="classQVImage.html#a55e71ad628f450ee82bb4226cb62ec17" title="Overloaded function from QVGenericImage::getRows().">getRows</a>();
<a name="l00085"></a>00085         <a class="code" href="classQVImage.html">QVImage&lt;uChar, 1&gt;</a> imageY(cols, rows);
<a name="l00086"></a>00086         <a class="code" href="classQVImage.html">QVImage&lt;uChar, 1&gt;</a> imageU(cols/2, rows/2);
<a name="l00087"></a>00087         <a class="code" href="classQVImage.html">QVImage&lt;uChar, 1&gt;</a> imageV(cols/2, rows/2);
<a name="l00088"></a>00088 
<a name="l00089"></a>00089         <a class="code" href="group__qvippICC.html#ga6bed5439d377438a4d1a687a2d326a69">RGBToYUV420</a>(imageRGB, imageY, imageU, imageV);
<a name="l00090"></a>00090 
<a name="l00091"></a>00091         <span class="keywordflow">return</span> <a class="code" href="group__qvip.html#ga8009ad640bdcbcec1c00f6a92f9aed27" title="Write YUV image frames to a yuv4mpeg2 video file.">writeYUV4MPEG2Frame</a>(file, imageY, imageU, imageV);
<a name="l00092"></a>00092         }
<a name="l00093"></a>00093 <span class="preprocessor">#endif</span>
<a name="l00094"></a>00094 <span class="preprocessor"></span>
<a name="l00095"></a><a class="code" href="group__qvip.html#ga77ad534a38a3c6e3de5607c07cc0e999">00095</a> <span class="keywordtype">bool</span> <a class="code" href="group__qvip.html#ga77ad534a38a3c6e3de5607c07cc0e999" title="Write the content of a QVImage (RGB) object in an image file.">writeQVImageToFile</a>(<span class="keyword">const</span> QString fileName, <span class="keyword">const</span> <a class="code" href="classQVImage.html">QVImage&lt;uChar, 3&gt;</a> &amp;image)
<a name="l00096"></a>00096         { <span class="keywordflow">return</span> ((QImage) image).save(fileName); }
<a name="l00097"></a>00097 
<a name="l00098"></a><a class="code" href="group__qvip.html#ga59a032b0b1c38254a95e383a39bf33a0">00098</a> <span class="keywordtype">bool</span> <a class="code" href="group__qvip.html#ga59a032b0b1c38254a95e383a39bf33a0" title="Reads the content of a QVImage (RGB) object from an image file.">readQVImageFromFile</a>(<span class="keyword">const</span> QString fileName, <a class="code" href="classQVImage.html">QVImage&lt;uChar, 3&gt;</a> &amp;image)
<a name="l00099"></a>00099         {
<a name="l00100"></a>00100         QImage qimg;
<a name="l00101"></a>00101 
<a name="l00102"></a>00102         <span class="keywordflow">if</span>(not qimg.load(fileName)) <span class="keywordflow">return</span> FALSE;
<a name="l00103"></a>00103         
<a name="l00104"></a>00104         image = <a class="code" href="classQVImage.html">QVImage&lt;uChar, 3&gt;</a>(qimg);
<a name="l00105"></a>00105 
<a name="l00106"></a>00106         <span class="keywordflow">return</span> TRUE;
<a name="l00107"></a>00107         }
<a name="l00108"></a>00108 
<a name="l00109"></a>00109 
<a name="l00111"></a>00111 
<a name="l00112"></a>00112 <span class="keywordtype">bool</span> readToBuffer(QFile &amp;file, <a class="code" href="classQVImage.html">QVImage&lt;uChar, 1&gt;</a> &amp;image)
<a name="l00113"></a>00113         {
<a name="l00114"></a>00114         <span class="keywordtype">bool</span> finished = <span class="keyword">false</span>;
<a name="l00115"></a>00115         uChar *buf_img_aux = image.<a class="code" href="classQVImage.html#a231507d781e33e508fac771b5284c3c9" title="Method to obtain image data buffer, in read/write mode.">getWriteData</a>();
<a name="l00116"></a>00116 
<a name="l00117"></a>00117         <span class="keywordtype">int</span> nbytes=0;
<a name="l00118"></a>00118         <span class="keywordflow">for</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0;i&lt;image.<a class="code" href="classQVImage.html#a55e71ad628f450ee82bb4226cb62ec17" title="Overloaded function from QVGenericImage::getRows().">getRows</a>();i++)
<a name="l00119"></a>00119                 {
<a name="l00120"></a>00120                 nbytes = file.read((<span class="keywordtype">char</span> *)(buf_img_aux), image.<a class="code" href="classQVImage.html#ad0f2758702ee4d96d538aa353ae81bb7" title="Overloaded function from QVGenericImage::getCols().">getCols</a>());
<a name="l00121"></a>00121 
<a name="l00122"></a>00122                 <span class="keywordflow">if</span>(nbytes==0 or nbytes==-1)
<a name="l00123"></a>00123                         {
<a name="l00124"></a>00124                         finished = TRUE;
<a name="l00125"></a>00125                         <span class="keywordflow">break</span>;
<a name="l00126"></a>00126                         }               
<a name="l00127"></a>00127                 buf_img_aux += image.<a class="code" href="classQVImage.html#a8c5cb45d0c7fbf135d89c5cb40ed4875" title="Overloaded function from QVGenericImage::getStep().">getStep</a>();
<a name="l00128"></a>00128                 }
<a name="l00129"></a>00129 
<a name="l00130"></a>00130         <span class="keywordflow">return</span> !finished;
<a name="l00131"></a>00131         }
<a name="l00132"></a>00132 
<a name="l00133"></a>00133 <span class="preprocessor">#include &lt;QStringList&gt;</span>
<a name="l00134"></a>00134 <span class="preprocessor">#include &lt;QRegExp&gt;</span>
<a name="l00135"></a>00135 
<a name="l00136"></a><a class="code" href="group__qvip.html#ga9dc03d51efde6cf108af4d6cac41cb82">00136</a> <span class="keywordtype">bool</span> <a class="code" href="group__qvip.html#ga9dc03d51efde6cf108af4d6cac41cb82" title="Read yuv4mpeg2 header from a video file.">readYUV4MPEG2Header</a>(QFile &amp;file, <span class="keywordtype">int</span> &amp;cols, <span class="keywordtype">int</span> &amp;rows, <span class="keywordtype">int</span> &amp;fps)
<a name="l00137"></a>00137         {
<a name="l00138"></a>00138         <span class="keyword">const</span> QString readedLine = file.readLine();
<a name="l00139"></a>00139 
<a name="l00140"></a>00140         <span class="keywordflow">if</span> (readedLine == NULL || readedLine == QString(<span class="stringliteral">&quot;MPLAYER ERROR\n&quot;</span>))
<a name="l00141"></a>00141                 {
<a name="l00142"></a>00142                 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00143"></a>00143                 }
<a name="l00144"></a>00144 
<a name="l00145"></a>00145         QRegExp rx;
<a name="l00146"></a>00146         QStringList widthTokens;
<a name="l00147"></a>00147 
<a name="l00148"></a>00148         <span class="comment">// Parse for special identifier</span>
<a name="l00149"></a>00149         rx.setPattern(<span class="stringliteral">&quot;YUV4MPEG2&quot;</span>);
<a name="l00150"></a>00150         <span class="keywordflow">if</span> (rx.indexIn(readedLine) == -1)
<a name="l00151"></a>00151                 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00152"></a>00152 
<a name="l00153"></a>00153         <span class="comment">// Parse for width (cols)</span>
<a name="l00154"></a>00154         rx.setPattern(<span class="stringliteral">&quot;(W)([0-9]+)&quot;</span>);
<a name="l00155"></a>00155         <span class="keywordflow">if</span> (rx.indexIn(readedLine) == -1)
<a name="l00156"></a>00156                 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00157"></a>00157         widthTokens = rx.capturedTexts();
<a name="l00158"></a>00158         cols = widthTokens.at(2).toInt();
<a name="l00159"></a>00159 
<a name="l00160"></a>00160         <span class="comment">// Parse for height (rows)</span>
<a name="l00161"></a>00161         rx.setPattern(<span class="stringliteral">&quot;(H)([0-9]+)&quot;</span>);
<a name="l00162"></a>00162         <span class="keywordflow">if</span> (rx.indexIn(readedLine) == -1)
<a name="l00163"></a>00163                 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00164"></a>00164         widthTokens = rx.capturedTexts();
<a name="l00165"></a>00165         rows = widthTokens.at(2).toInt();
<a name="l00166"></a>00166 
<a name="l00167"></a>00167         <span class="comment">// Parse for fps</span>
<a name="l00168"></a>00168         rx.setPattern(<span class="stringliteral">&quot;(F)([0-9]+):([0-9]+)&quot;</span>);
<a name="l00169"></a>00169         <span class="keywordflow">if</span> (rx.indexIn(readedLine) == -1)
<a name="l00170"></a>00170                 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00171"></a>00171         widthTokens = rx.capturedTexts();
<a name="l00172"></a>00172         fps = widthTokens.at(2).toInt() / widthTokens.at(3).toInt();
<a name="l00173"></a>00173 
<a name="l00174"></a>00174         <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00175"></a>00175         }
<a name="l00176"></a>00176 
<a name="l00177"></a><a class="code" href="group__qvip.html#ga28c6421742db54f40f50da2387aea93e">00177</a> <span class="keywordtype">bool</span> <a class="code" href="group__qvip.html#ga28c6421742db54f40f50da2387aea93e" title="Read YUV image frames from a yuv4mpeg2 video file.">readYUV4MPEG2Frame</a>(QFile &amp;file, <a class="code" href="classQVImage.html">QVImage&lt;uChar&gt;</a> &amp;imageY, <a class="code" href="classQVImage.html">QVImage&lt;uChar&gt;</a> &amp;imageU, <a class="code" href="classQVImage.html">QVImage&lt;uChar&gt;</a> &amp;imageV)
<a name="l00178"></a>00178         {
<a name="l00179"></a>00179         <span class="keyword">const</span> QString yuv4mpeg2header = file.readLine();
<a name="l00180"></a>00180 
<a name="l00181"></a>00181         <span class="keywordflow">if</span> (    readToBuffer(file, imageY)      &amp;&amp;
<a name="l00182"></a>00182                 readToBuffer(file, imageU)      &amp;&amp;
<a name="l00183"></a>00183                 readToBuffer(file, imageV)      )
<a name="l00184"></a>00184                 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00185"></a>00185         <span class="keywordflow">else</span>
<a name="l00186"></a>00186                 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00187"></a>00187         }
</pre></div></div>
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<center><a href="http://perception.inf.um.es/QVision">QVision framework</a>.
<a href="http://perception.inf.um.es">PARP research group</a>.
Copyright &copy; 2007, 2008, 2009, 2010, 2011.</center>
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